Core i7-8650U vs i5-8250U
Description
Both models i7-8650U and i5-8250U are based on Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i7-8650U gets a score of 173.5 k points while the i5-8250U gets 161.3 k points.
Summarizing, the i7-8650U is 1.1 times faster than the i5-8250U. To get a proper comparison between both models, take a look to the data shown below.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i7-8650U gets a score of 173.5 k points while the i5-8250U gets 161.3 k points.
Summarizing, the i7-8650U is 1.1 times faster than the i5-8250U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ea
806ea
Core
Kaby Lake-R
Kaby Lake-R
Base frecuency
1.9 GHz
1.6 GHz
Boost frecuency
4.2 GHz
3.4 GHz
Socket
BGA 1356
BGA1356
Cores/Threads
4/8
4/8
TDP
15 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
8192 kB
6144 kB
Date
August 2017
August 2017
Mean monothread perf.
55.86k points
54.31k points
Mean multithread perf.
173.49k points
161.26k points
AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i7-8650U
i5-8250U
Test#1 (Integers)
21.61k
22.11k (x1.02)
Test#2 (FP)
19.69k
19.64k (x1)
Test#3 (Generic, ZIP)
4.61k
4.54k (x0.98)
Test#1 (Memory)
9.95k
8.03k (x0.81)
TOTAL
55.86k
54.31k (x0.97)
Multithread
i7-8650U
i5-8250U
Test#1 (Integers)
78.38k
74.19k (x0.95)
Test#2 (FP)
72.02k
66.27k (x0.92)
Test#3 (Generic, ZIP)
16.95k
15.97k (x0.94)
Test#1 (Memory)
6.15k
4.83k (x0.79)
TOTAL
173.49k
161.26k (x0.93)
Performance/W
i7-8650U
i5-8250U
Test#1 (Integers)
5225 points/W
4946 points/W
Test#2 (FP)
4802 points/W
4418 points/W
Test#3 (Generic, ZIP)
1130 points/W
1065 points/W
Test#1 (Memory)
410 points/W
322 points/W
TOTAL
11566 points/W
10751 points/W
Performance/GHz
i7-8650U
i5-8250U
Test#1 (Integers)
5146 points/GHz
6503 points/GHz
Test#2 (FP)
4689 points/GHz
5777 points/GHz
Test#3 (Generic, ZIP)
1097 points/GHz
1334 points/GHz
Test#1 (Memory)
2368 points/GHz
2361 points/GHz
TOTAL
13300 points/GHz
15975 points/GHz
Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.
Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.
Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.
Test#1 (Integers) [points vs time]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.
If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.
If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.
Test#1 (Integers) [points vs time]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4